\(\frac{3}{x+2}=\frac{x+2}{3}\)
\(\Rightarrow\left(x+2\right)\left(x+2\right)=3^2\)
\(\Rightarrow\left(x+2\right)^2=3^2\)
\(\Rightarrow\orbr{\begin{cases}x+2=3\\x+2=-3\end{cases}}\Rightarrow\orbr{\begin{cases}x=1\\x=-5\end{cases}}\)
A = {-5 ; 1}
3/x+2=x+2/3=>9
=> (X+2)(x+2)=3*3
=> (x+2)(x+2)=9
=>X=1;-5